Super Mario Bros Level Builder
Create your own Super Mario Bros scenes and levels online using this builder! Yes, it's currently limited, but it comes with most important sprites you need such as Mario, Luigi, Princess Peach and Bowser, all blocks and items, many landmarks like the flag and a couple of common enemies (and their 'dead' forms).
If you cannot see the above, you need the Flash Player from Adobe's Website to play the quiz (or do much else in this section of the website). Sorry for that.
Play Full Screen
If you want to use the level builder in a full window, click this link below:
Super Mario Bros Level Builder; Full Screen Version
All coding by Nintendan of the DS Ultimate forums.